EP2699089B1 - Verwendung von sprühstreuungs-reduzierungsmittel mit tensiden mit niedrigem hlb-wert - Google Patents
Verwendung von sprühstreuungs-reduzierungsmittel mit tensiden mit niedrigem hlb-wert Download PDFInfo
- Publication number
- EP2699089B1 EP2699089B1 EP12773871.4A EP12773871A EP2699089B1 EP 2699089 B1 EP2699089 B1 EP 2699089B1 EP 12773871 A EP12773871 A EP 12773871A EP 2699089 B1 EP2699089 B1 EP 2699089B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hlb
- surfactants
- spray
- surfactant
- spray drift
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/24—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing ingredients to enhance the sticking of the active ingredients
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/30—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests characterised by the surfactants
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N57/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds
- A01N57/10—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-oxygen bonds or phosphorus-to-sulfur bonds
- A01N57/12—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-oxygen bonds or phosphorus-to-sulfur bonds containing acyclic or cycloaliphatic radicals
Definitions
- This invention relates generally to drift reduction agents for use in agricultural applications, but may also be applied in other applications where it is beneficial to reduce off-target deposition.
- Spray drift may be defined as the physical movement of airborne spray particles through the air at the time of application or soon thereafter to any off-target site.
- formulations with greater spray drift characteristics are typically unfavorable because less of the formulation interacts with the target site.
- drift reduction agents are typically added to the spray mixtures to reduce the amount of spray drift that occurs.
- DTT drift reduction technology
- TMA tank mix adjuvants
- oils that can be mineral or natural based, such as esterified seed oil. These oils produce either emulsions or invert emulsions that are thought to function by preventing small drops from forming during spray generation due to the emulsion phase present.
- Surfactants are typically added to many pesticidal spray solutions to increase bioefficacy. When a surfactant is added to a spray solution the surface tension and dynamic surface tensions may be reduced. It is thought that this reduction in surface tension makes it easier to generate smaller droplets. Adding a surfactant typically reduces the average particle size and more importantly generally increases the amount of fines generated during spraying. It is the finer particles that typically drift the most. Therefore, despite their other benefits, surfactants are not typically thought of as agents to reduce spray drift.
- EP 0331474 A1 discloses a spray formulation comprising an improved evaporation retardant for solving the problem of spray drift.
- HLB hydrophilic-lipophilic balance
- Surfactants are amphiphilic molecules that concentrate at the interface between two phases and modify the properties of that interface.
- a list of surfactants can be found in McCutcheon's Emulsifiers & Detergents or the Industrial Surfactants Handbook .
- the hydrophilic-lipophilic balance (HLB) of a surfactant is measured on an empirical scale developed by Griffin ( W.C.Griffin, J. Cosmet. Chem., 1, 311, 1949 ). This scale ranges from 0 to 20, with 0 for a completely lipophilic molecule and 20 for a completely hydrophilic molecule.
- the function of surfactants can be generally described by their HLB number. Defoaming surfactants have an HLB range of 1-3.
- Water-in-oil emulsifiers have an HLB range of 3-6. Wetting agents have an HLB range of 7-9. Oil-in-water emulsifiers have an HLB range of 8-18. Detergents have an HLB range of 13-15. Solubilizers have an HLB range of 15-18.
- Surfactants with low HLB are not considered soluble in water. They are considered dispersible in water. They may form this dispersed phase spontaneously, without agitation. In other words, low HLB surfactants form a surfactant-rich dispersed phase when added to water. The presence of the dispersed surfactant-rich phase is thought to reduce the amount of fines formed during the spray atomization process. This novel DRT TMA chemistry is not believed to deleteriously broaden the particle size distribution as the polymeric DRT agents do.
- low HLB is defined as any surfactant HLB that will result in the surfactant's cloud point as measured in the targeted spray system being below the temperature at which the system is sprayed. In the embodiments of the present invention this HLB is from about 7 to about 9. However, the actual HLB required will therefore be a function of the spray system components and their concentrations.
- a dispersed surfactant-rich phase will form, and this dispersed phase will function to reduce the fines generated even though the surface tension is reduced due to the presence of the dispersed surfactant phase.
- Higher HLB surfactants should also reduce fines if used above their cloud point. This would normally require elevated temperatures in the absence of formulation additives designed to reduce the cloud point.
- SURFONIC® surfactants that are commercially available from the Huntsman Corporation of The Woodlands, Texas.
- Embodiments of the present invention also disclose the use of a reducing spray drift agent in a pesticidal composition to reduce spray drift that comprises one or more active ingredients and one or more low hydrophilic-lipophilic balance surfactants having a HLB value in the range of 7 to 9.
- the one or more active ingredients may be herbicides, insecticides, fungicides or combinations thereof.
- Such herbicides may be water soluble herbicides such as glyphosate or one or more salts or esters thereof.
- Also disclosed ia a method of reducing spray drift comprising providing a composition for spraying that comprises a surfactant and spraying the spray mixture above the surfactant's cloud point as measured in the spray mixture.
- a spray composition comprising a blend of two or more surfactants wherein the blend has a low hydrophilic-lipophilic balance.
- a method is disclosed of producing a spray drift reduction composition by blending a low HLB surfactant with a second surfactant (such as higher HLB surfactants) to produce a blend with a low hydrophilic-lipophilic balance.
- a second surfactant such as higher HLB surfactants
- a user may add low HLB surfactants to a spray tank mixture.
- the pesticidal composition would have a blend of two or more surfactants where the effective surfactant blend has a combined low HLB level.
- the primary application of this technology will be to reduce drift during the spraying of pesticide formulations.
- the technology may also be applicable in other areas such as polyurethane or polyurea spraying, paint spraying, or other spraying systems where it is beneficial to reduce off-target deposition.
- Table 1 shows particle size data.
- the spray particle size distribution and percent fines can be measured using ASTM Standard Test Method E2798: "Characterization of Performance of Pesticide Spray Drift Reduction Adjuvants for Ground Application.” Sample solutions where sprayed through a nozzle (XR8004VS) at 40 psig.
- Example 1 the pesticide composition, contains 1.7v/v% POWERMAX® herbicide (commercially available from The Monsanto Company of St. Louis, Missouri. POWERMAX is a registered mark of The Monsanto Company) diluted into 342 ppm hardness water.
- EO average 3 moles ethylene oxide
- Example 3 is the same base composition as Example 1 except it also contains 0.5% SURFONIC® L12-3 surfactant which is commercially available from the Huntsman Corporation of The Woodlands, Texas.
- Example 4 is the same base composition as Example 1 except it also contains 0.5% SURFONIC® TDA-3B surfactant which is commercially available from Huntsman Corporation of The Woodlands, Texas.
- Example 5 is the same base composition as Example 1 except it also contains 0.5% TERMIX® 5910 tank mix adjuvant which is commercially available from Huntsman Corporation of The Woodlands, Texas.
- Table 1 Particle Size Data Example %FINES ⁇ 105 ⁇ m D10 ( ⁇ m) VMD [D50] ( ⁇ m) D90 ( ⁇ m) REL SPAN KINE VISC (cSt) DST @ 10mS (mN/m) DST @ 1s (mN/m) EXT VISC 1 16.0 85.7 198.6 387.9 1.52 0.734 51.3 42.9 1.00 2 10.8 100.0 265.4 420.9 1.21 0.844 52.5 32.1 6.94 3 9.4 107.5 238.2 404.6 1.25 0.870 36.6 27.5 6.93 4 8.7 112.5 273.4 426.7 1.15 0.827 48.8 26.9 6.84 5 9.8 105.8 251.8 412.5 1.22 0.743 43.4 29.7 6.80
- Examples 1 and 5 are comparative examples.
- Table 1 shows several low HLB surfactants that reduce the amount of fines while also reducing both dynamic (10 mSec) and static (1 s) surface tension.
- Table 1 also shows that the low HLB surfactant SURFONIC TDA-3B reduced %fines ⁇ 105 microns from 16.0 v/v% with no DRT adjuvant to a value of only 8.7 %. This is almost a 50% reduction in fines, while dynamic surface tension dropped from 51.3 to 48.8 mN/m and static surface tension dropped from 42.9 to 26.9 mN/m. Normally a reduction in tension would result in an increase in the volume of fines generated during spraying.
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- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Agronomy & Crop Science (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Toxicology (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Catching Or Destruction (AREA)
Claims (6)
- Verwendung eines Mittels zur Verringerung der Sprühabdrift in einer Zusammensetzung zum Sprühen, wobei das Mittel zur Verringerung der Sprühabdrift ein oder mehrere Tenside mit niedrigem hydrophil-lipophilen Gleichgewicht umfasst, die ausgewählt sind aus der Gruppe bestehend aus linearem C10-12-Alkoholethoxylat mit einem Durchschnitt von 3 Mol Ethylenoxid und einem HLB von 9,0; einem linearen C12-16-Alkoholethoxylat mit einem Durchschnitt von 3 Mol Ethylenoxid und einem HLB von 8,0 und einem verzweigten C13-Alkoholethoxylat mit einem Durchschnitt von 3 Mol Ethylenoxid und einem HLB von 8,0.
- Verwendung nach Anspruch 1, wobei die Zusammensetzung zum Sprühen ferner einen oder mehrere Wirkstoffe umfasst.
- Verwendung nach Anspruch 2, wobei der eine oder die mehreren Wirkstoffe ein Herbizid umfassen.
- Verwendung nach irgendeinem der Ansprüche 2 oder 3, wobei der eine oder die mehreren Wirkstoffe ein Insektizid umfassen.
- Verwendung nach irgendeinem der Ansprüche 2 bis 4, wobei der eine oder die mehreren Wirkstoffe ein Fungizid umfassen.
- Verwendung nach irgendeinem der Ansprüche 2 bis 5, wobei der Wirkstoff Glyphosat oder ein oder mehrere Salze von Estern davon ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161477251P | 2011-04-20 | 2011-04-20 | |
PCT/US2012/032265 WO2012145177A1 (en) | 2011-04-20 | 2012-04-05 | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2699089A1 EP2699089A1 (de) | 2014-02-26 |
EP2699089A4 EP2699089A4 (de) | 2014-09-03 |
EP2699089B1 true EP2699089B1 (de) | 2019-09-04 |
Family
ID=47041879
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12773871.4A Active EP2699089B1 (de) | 2011-04-20 | 2012-04-05 | Verwendung von sprühstreuungs-reduzierungsmittel mit tensiden mit niedrigem hlb-wert |
Country Status (11)
Country | Link |
---|---|
US (2) | US20130150241A1 (de) |
EP (1) | EP2699089B1 (de) |
JP (2) | JP6227524B2 (de) |
CN (1) | CN103442559B (de) |
AR (1) | AR086105A1 (de) |
AU (1) | AU2012245869B2 (de) |
BR (1) | BR112013024083A8 (de) |
CA (1) | CA2830518C (de) |
ES (1) | ES2756799T3 (de) |
MX (1) | MX352462B (de) |
WO (1) | WO2012145177A1 (de) |
Families Citing this family (9)
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AU2012245869B2 (en) * | 2011-04-20 | 2015-12-03 | Indorama Ventures Oxides Llc | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
CA2848515C (en) | 2011-09-12 | 2017-07-18 | Rhodia Operations | Agricultural pesticide compositions |
EP2894979A4 (de) * | 2012-09-11 | 2016-05-11 | Vitel Australia Pty Ltd | Sprühstreuungsadjuvansformulierung und verfahren zur verwendung |
JP2015531409A (ja) * | 2012-10-12 | 2015-11-02 | ダウ アグロサイエンシィズ エルエルシー | 除草剤の噴霧ドリフトを制御するためのアルキルベンゼンスルホネート界面活性剤 |
RU2631235C2 (ru) | 2013-08-14 | 2017-09-20 | Крода, Инк. | Комбинация вспомогательных веществ |
ES2791250T3 (es) * | 2014-10-08 | 2020-11-03 | Evonik Operations Gmbh | Uso de ésteres de poliglicerina autoemulsionantes, hidrófobos como adyuvantes y agentes antiarrastre de pulverización |
US20160374334A1 (en) | 2015-06-29 | 2016-12-29 | Lamberti Spa | Method for reducing spray drift |
WO2019238948A1 (en) * | 2018-06-14 | 2019-12-19 | Université de Liège | Bio-herbicide based on essential oil |
CN112741102A (zh) * | 2020-12-30 | 2021-05-04 | 浙江新安化工集团股份有限公司 | 一种精草铵膦除草剂 |
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AU2012245869B2 (en) * | 2011-04-20 | 2015-12-03 | Indorama Ventures Oxides Llc | Spray drift reduction agents comprising low hydrophilic-lipophilic balance surfactants |
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2012
- 2012-04-05 AU AU2012245869A patent/AU2012245869B2/en active Active
- 2012-04-05 EP EP12773871.4A patent/EP2699089B1/de active Active
- 2012-04-05 CN CN201280013357.2A patent/CN103442559B/zh active Active
- 2012-04-05 ES ES12773871T patent/ES2756799T3/es active Active
- 2012-04-05 MX MX2013011447A patent/MX352462B/es active IP Right Grant
- 2012-04-05 JP JP2014506438A patent/JP6227524B2/ja active Active
- 2012-04-05 CA CA2830518A patent/CA2830518C/en active Active
- 2012-04-05 BR BR112013024083A patent/BR112013024083A8/pt not_active IP Right Cessation
- 2012-04-05 US US13/696,826 patent/US20130150241A1/en not_active Abandoned
- 2012-04-05 WO PCT/US2012/032265 patent/WO2012145177A1/en active Application Filing
- 2012-04-18 AR ARP120101321A patent/AR086105A1/es active IP Right Grant
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2016
- 2016-01-04 US US14/987,126 patent/US10123532B2/en active Active
- 2016-09-06 JP JP2016173434A patent/JP6230671B2/ja active Active
Non-Patent Citations (1)
Title |
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Also Published As
Publication number | Publication date |
---|---|
CN103442559A (zh) | 2013-12-11 |
JP6230671B2 (ja) | 2017-11-15 |
MX352462B (es) | 2017-11-27 |
JP2017036286A (ja) | 2017-02-16 |
EP2699089A1 (de) | 2014-02-26 |
US20130150241A1 (en) | 2013-06-13 |
ES2756799T3 (es) | 2020-04-27 |
JP2014512383A (ja) | 2014-05-22 |
BR112013024083A2 (pt) | 2016-08-09 |
CA2830518A1 (en) | 2012-10-26 |
AU2012245869B2 (en) | 2015-12-03 |
MX2013011447A (es) | 2013-10-17 |
AU2012245869A1 (en) | 2013-09-19 |
AR086105A1 (es) | 2013-11-20 |
US20160219873A1 (en) | 2016-08-04 |
EP2699089A4 (de) | 2014-09-03 |
JP6227524B2 (ja) | 2017-11-08 |
WO2012145177A1 (en) | 2012-10-26 |
CA2830518C (en) | 2019-07-16 |
CN103442559B (zh) | 2017-03-22 |
US10123532B2 (en) | 2018-11-13 |
BR112013024083A8 (pt) | 2018-01-16 |
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